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Geography word of the week: tombolo

Posted by in Nature on Wednesday, March 9, 2016

Frank Island near Tofino, B.C. is connected to the mainland by a sandy tombolo, which forms part of popular Chesterman Beach. (Photos: Google Earth, Chris Lawes/CanGeo Photo Club)



A narrow piece of land made of sediment such as sand or gravel that connects an island to the mainland or another island.


Late eighteenth-century Italian tombolo for sand dune; from Latin tumulus meaning “hillock, mound.”


Frank Island near Tofino, British Columbia, is a good example of a tombolo. The rocky island is connected to the mainland by a large sandbar, which forms part of Chesterman Beach, a popular destination among locals. An island attached to the mainland by a tombolo is known as a tied island. Several islands connected by tombolos are called a tombolo cluster. Two or more can form a lagoon.

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